Sounds like they have put you through the mill and you are yonung still! I had this when I was younger, but they told me it was IBS. Perhaps that is all it was at that time, but now it is diverticular colitis.
My treatement plan is colazal and rowaza nightime enema thing (I rarely use it) I hate doing it and then I also fall asleep and don't get to do it. It is a med you have to hold in, so it isn't really an enema.
I also have to stay on a low residue diet or I get cramps and have to go a lot. Corn products (even corn chips) anything with fiber in it especially uncooked veggies, lettuce & tomato (and tomato products like tomato sauce or marinara spaghetti sauce) all do me in. This is even with the medications. So, it is very aggrevating. I am still learning what I can and cannot eat and how much of it. Sometimes if I eat just a little of the offending food, I do ok. My stomach has been like this for years now.
Four years ago, I got really sick, they put me in the hospital, did a CT scan which showed inflammation only. They did a colonoscopy and biopsies that they said were all normal. However, while in hospital, they gave me antibiotics, steroids (I was allergic to the CT scan dye) and anti-inflammatories. My stomach was wonderful for about 6 weeks afterwards but then it went back to its old tricks. It sounds to me like I had some inflammatory disease before I got the diverticular disease and back then, I had constipation. Nothing I could do would make it better. Now that I am on the colazal, at least I can go to the bathroom when I feel the urge. Before, when I ate an offending food, I basically couldn't go.
so, that is my story. Sorry if it was too long.
I hope the colonoscopy goes ok for you. Where are you located? Are you pretty sick from all this? It sounds like you have a lot going on. Are you loosing a lot of weight? I am lucky in that respect, I am not loosing weight, so my problems are not quite as bad. Sometimes, I really think I may have some food allergy problems. sounds like you have to travel a long distance to a larger city and that isn't easy when you are sick. I hope you have a support system of friends or family.
diagnosed 1/09 with colitis,54 yo, colazal, fish oil, synthroid, cymbalta